CN102789122A - DLP (digital light processing) projection optical system based on LED (light-emitting diode) light source - Google Patents
DLP (digital light processing) projection optical system based on LED (light-emitting diode) light source Download PDFInfo
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- CN102789122A CN102789122A CN2012102464783A CN201210246478A CN102789122A CN 102789122 A CN102789122 A CN 102789122A CN 2012102464783 A CN2012102464783 A CN 2012102464783A CN 201210246478 A CN201210246478 A CN 201210246478A CN 102789122 A CN102789122 A CN 102789122A
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Abstract
The invention discloses a DLP (digital light processing) projection optical system based on LED (light-emitting diode) light sources. The DLP projection optical system based on the LED light sources comprises an LED light source illuminating system, a DMD (digital micromirror device), a TIR (total internal reflection) prism and a projection lens, wherein the LED light source illuminating system comprises an LED light source set, a tapered light pipe and a relay lens set, the tapered light pipe is unilaterally tapered, the aperture of the incident end of the tapered light pipe is proportionally close to light sources, the length-to-width ratio of the incident end is 1:1, the length-to-width ratio of the emergent end of the tapered light pipe is 16:10 and the short side of the intermediate diameter of the emergent end is consistent with the size of the incident end; and the DMD is a diamond pixel and a hinge direction perpendicular to the DMD pixel is the long side direction of the tapered light pipe. The DLP projection optical system based on the LED light sources has the advantages that the problem that a plane LED light source is not matched with the length-to-width ratio of a DMD chip is solved, the energy utilization ratio of a digital projector system is improved and the contrast of the digital projector system is not decreased.
Description
Technical field
The invention belongs to miniature or portable projection machine technology field, be specifically related to a kind of DLP projection optical system based on led light source.
Background technology
In recent years; The DLP projection display technique relies on its abundant colors, the picture of high-resolution, the image of high brightness and the demonstration of high-contrast to be developed rapidly, and it can realize that volume is littler, the product performance that weight is lighter; Particularly digital at the cinema projection field, its advantage is incomparable.What the core component in the DLP technology mainly adopted is DMD digital picture chip; DMD is the exclusive digital picture chip of grasping and developing of TIX; It is made up of the digital micro-mirror of a lot of arranged; Miniature reflective mirror has the upset of 10 degree, 12 degree or 14 degree with image digital signal during work, will get into projection lens from the upset reflection through micro-reflector of the light beam of lighting source and be imaged on the screen.Be the incident angle of coupling dmd chip, improve the homogeneity of projection display picture, the rational deployment projection device components.
The appearance of led light source lets projector obtain innovation from light source technology, sweeps the innovation hurricane in the projection industry.Led light source is a solid state light emitter, never is that the mercury lamp vacuum bulb can match in excellence or beauty in the advantage aspect the anti-vibration damage; Led light source is a digital light, and Modulatory character preferably can be provided, and satisfies the application demand of high-performance projection and energy-conservation projection; Led light source satisfies the characteristic of wide colour gamut high-contrast, and more colorful display technique effect can be provided; Led light source all belongs to the cold light source technology, and luminescence efficiency is high but also in continuous lifting, theoretical value is at more than three times of mercury lamp, and this not only meets the theory of environmental protection and energy saving, more can simplify the design of projector heat radiation and life support system significantly; Led light source is the long-life light source, and short life breaks through 20000 hours, and MaLS can be supported the application more than 100,000 hours, and from then on projection products can take leave of the consumptive material epoch.
Led light source has above-mentioned plurality of advantages, but also have the light source dispersion angle big-nearly bright wavelength-division cloth, light is the shortcoming of easily collecting not.The led light source minitype projection machine of the high brightness that goes on the market before this, like the GP1 of Benq, the K10 of grand base etc., the DLP projection optical systems that adopt such as Otto sign indicating number DH5101 are used the compound eye light structures in the even photosystem of optics more, and compact conformation, overall brightness are also higher.But the system aperture angle that is to use is bigger, and the flip angle limit that has even surpassed the DMD micro mirror makes the flat-shaped attitude light of part get into positive status, and contrast descends, and influences overall image quality.
Summary of the invention
For solving the above-mentioned defective that prior art exists; The purpose of this invention is to provide a kind of DLP projection optical system based on led light source; Solved the length breadth ratio mismatch problem of plane led light source and dmd chip, improved digital projector system capacity utilization factor and do not reduce the contrast of projector system.
For realizing above-mentioned purpose; The technical scheme that the present invention adopted: should have the led light source illuminator, DMD device, TIR prism and projection lens based on the DLP projection optical system of led light source; It is characterized in that: said led light source illuminator is made up of led light source group, taper optical wand, relay lens group; Said taper optical wand is monolateral taper, and its incident port footpath is approaching with the light source ratio, and length breadth ratio is 1:1; The exit end length breadth ratio is 16:10, footpath minor face and incident end consistent size in the exit end; Said DMD device is a diamond pixels, is being the long side direction of taper optical wand perpendicular to DMD device pixel hinge direction.
Be provided with an antireflection diaphragm in the aperture diaphragm position in the said relay lens group.
Said projection lens adopts the ellipse-shaped light hurdle.
Said led light source group comprises light shaping combined system, and it is made up of crossed dichroic mirror and lens; Wherein comprise a slice non-spherical lens at least, said lens are with the approximate incident end that is imaged on the taper optical wand of led light source.
Adopt the beneficial effect of technique scheme: the illumination section of this optical projection system adopts monolateral taper optical wand; When the DMD device is worked; Each pixel of DMD device of diamond pixels along hinge direction do not stop in " 12 ° ", " 0 ° ", " 12 ° " upsets (corresponding to 12 ° of DMD devices); Get into the incident light reflection of inciding perpendicular to DMD device pixel hinge direction in the projection lens; This part light is equivalent to the light that the projection lens numerical aperture is F/2.4, is provided by the long side direction of illumination path taper optical wand.In addition; After the light that is parallel to DMD device pixel hinge direction is through DMD device pixel reflects, get into projection lens; This part light is equivalent to the light that the projection lens numerical aperture is F/1.5; This part light is provided by the short side direction of illumination path taper optical wand, thereby the light of led light source is fully used, and has increased the capacity usage ratio of system; Simultaneously perpendicular to DMD device pixel hinge direction, the light angle that illuminator provides is numerical aperture F/2.4, with the projection lens of DMD device the elliptical light hurdle well mated, thereby do not reduce the contrast of system.So the projection optical system that adopts such scheme to be designed to both can improve digital projector system capacity utilization factor, can obtain the projector system higher contrast ratio again.
Description of drawings
Below in conjunction with accompanying drawing specific embodiment of the present invention is done further detailed explanation.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the elliptical light hurdle shape figure of camera lens used herein.
Embodiment
DLP projection optical system based on led light source as shown in Figure 1 is made up of led light source group 1, taper optical wand 2, relay lens group 3, DMD device 4, TIR prism 5 and projection lens 6.Use PT54 (4:3) light source 7 of Luminus, DMD device 4 is 0.45 cun wxga (16:10) chip, and wherein led light source group 1 comprises light shaping combined system, and it is by crossed dichroic mirror 10,11, and lens (8,9,12) are formed; Lens 9,12 are non-spherical lens, and three lens are with the approximate incident end that is imaged on the taper optical wand of led light source, and light shaping combined system has compact conformation, the characteristics that efficiency of energy collection is high.Said taper optical wand 2 is monolateral taper; Its incident port footpath is approaching with the light source ratio, and length breadth ratio is 1:1, and the exit end length breadth ratio is 16:10; Consistent with the DMD device; Footpath minor face and incident end consistent size in the exit end, said DMD device is a diamond pixels, is being the long side direction of taper optical wand perpendicular to DMD device pixel hinge direction.Concrete, taper optical wand incident end is of a size of 4.1X4.1, and exit end is 6.2X4.1.Through the led light source light of shaping, be the light of the different numerical apertures of both direction through outgoing behind the taper optical wand, be radiated on the DMD device 4 through relay lens group 3.For obtaining the better illumination effect; Wherein relay lens group 3 is made up of four lens (13,14,16,17), is used for optical wand outgoing end face is imaged on the DMD display chip well, near aperture diaphragm, is provided with a smooth hurdle 15; Be used to tackle parasitic light, to obtain higher contrast ratio.Be the long side direction of taper optical wand perpendicular to DMD device pixel hinge direction; Flip angle+/-12 degree that equal dmd chip in this directional lighting system light angle are F/2.4; With the projection lens of DMD device the elliptical light hurdle well mated, thereby do not reduce the contrast of system.Being parallel to DMD device pixel hinge direction is the short side direction of taper optical wand, is F/1.5 in this directional lighting system light angle, and dmd chip is on this direction and light is not had angle limits, can maximize the capacity usage ratio that improves led light source.The DMD device sees through the projection lens outgoing through Digital Signals on screen by the micro mirror reflection ray, forms coloury image.Wherein projection lens adopts ellipse-shaped light hurdle 18, and is as shown in Figure 2, its axial direction can with DMD device and illuminator well matched, thereby reach technical ability raising system capacity utilization factor, can reach higher effect again to this degree.Can reach luminous flux 400lm through actual test native system, full switch is to the good images effect of this degree 1000:1.
Innovation of the present invention is through the taper optical wand led light source emergent ray to be changed into the emergent ray of the different aperture angles of both direction, and aperture angle is complementary with the dmd chip flip angle on direction therein, thus the brightness and contrast of realization image optimum.Every employing structure of the present invention or similar structures are realized identical goal of the invention, all belong to the category of the present invention's protection.
Claims (4)
1. the DLP projection optical system based on led light source has the led light source illuminator, DMD device, TIR prism and projection lens; It is characterized in that: said led light source illuminator is made up of led light source group, taper optical wand, relay lens group; Said taper optical wand is monolateral taper, and its incident port footpath is approaching with the light source ratio, and length breadth ratio is 1:1; The exit end length breadth ratio is 16:10, footpath minor face and incident end consistent size in the exit end; Said DMD device is a diamond pixels, is being the long side direction of taper optical wand perpendicular to DMD device pixel hinge direction.
2. the DLP projection optical system based on led light source as claimed in claim 1 is characterized in that: be provided with an antireflection diaphragm in the aperture diaphragm position in the said relay lens group.
3. according to claim 1 or claim 2 the DLP projection optical system based on led light source, it is characterized in that: said projection lens adopts the ellipse-shaped light hurdle.
4. the DLP projection optical system based on led light source as claimed in claim 1 is characterized in that: said led light source group comprises light shaping combined system, and it is made up of crossed dichroic mirror and lens; Wherein comprise a slice non-spherical lens at least, said lens are with the approximate incident end that is imaged on the taper optical wand of led light source.
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| CN2012102464783A CN102789122A (en) | 2012-07-17 | 2012-07-17 | DLP (digital light processing) projection optical system based on LED (light-emitting diode) light source |
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| CN2012102464783A CN102789122A (en) | 2012-07-17 | 2012-07-17 | DLP (digital light processing) projection optical system based on LED (light-emitting diode) light source |
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Cited By (13)
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| CN104698726A (en) * | 2013-12-04 | 2015-06-10 | 日立乐金光科技株式会社 | Optical unit, projection display apparatus and imaging apparatus |
| CN104932188A (en) * | 2015-06-25 | 2015-09-23 | 苏州佳世达光电有限公司 | Projecting device and light integrating column used for same |
| CN105137704A (en) * | 2015-09-10 | 2015-12-09 | 深圳市点睛创视技术有限公司 | Novel illuminating system and projection light engine using the same |
| CN105446065A (en) * | 2015-12-31 | 2016-03-30 | 中国华录集团有限公司 | Laser projection system |
| CN105759548A (en) * | 2016-04-15 | 2016-07-13 | 苏州佳世达光电有限公司 | Projector |
| US10036939B2 (en) | 2016-04-08 | 2018-07-31 | Qisda Optronics (Suzhou) Co., Ltd. | Biaxially-tilted digital micromirror projector |
| CN109946907A (en) * | 2017-12-20 | 2019-06-28 | 中强光电股份有限公司 | Projection arrangement |
| WO2019205786A1 (en) * | 2018-04-28 | 2019-10-31 | 青岛海信激光显示股份有限公司 | Projection device |
| CN111103744A (en) * | 2018-10-26 | 2020-05-05 | 深圳光峰科技股份有限公司 | Display device and display system |
| CN111694208A (en) * | 2019-03-14 | 2020-09-22 | 中强光电股份有限公司 | Projection device |
| CN112596230A (en) * | 2020-12-16 | 2021-04-02 | 航天科工微电子系统研究院有限公司 | Light path system for photoelectric tracking active chromatographic illumination |
| WO2021204030A1 (en) * | 2020-04-07 | 2021-10-14 | 深圳光峰科技股份有限公司 | Opto-mechanical system and projection device applying same |
| US11669002B2 (en) | 2021-06-16 | 2023-06-06 | Coretronic Corporation | Illumination system and projection device |
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| WO2019205786A1 (en) * | 2018-04-28 | 2019-10-31 | 青岛海信激光显示股份有限公司 | Projection device |
| CN111103744B (en) * | 2018-10-26 | 2022-09-23 | 深圳光峰科技股份有限公司 | Display device and display system |
| CN111103744A (en) * | 2018-10-26 | 2020-05-05 | 深圳光峰科技股份有限公司 | Display device and display system |
| CN111694208A (en) * | 2019-03-14 | 2020-09-22 | 中强光电股份有限公司 | Projection device |
| CN111694208B (en) * | 2019-03-14 | 2022-02-22 | 中强光电股份有限公司 | Projection device |
| US11789282B2 (en) | 2019-03-14 | 2023-10-17 | Coretronic Corporation | Projection apparatus |
| WO2021204030A1 (en) * | 2020-04-07 | 2021-10-14 | 深圳光峰科技股份有限公司 | Opto-mechanical system and projection device applying same |
| CN112596230A (en) * | 2020-12-16 | 2021-04-02 | 航天科工微电子系统研究院有限公司 | Light path system for photoelectric tracking active chromatographic illumination |
| CN112596230B (en) * | 2020-12-16 | 2022-09-20 | 航天科工微电子系统研究院有限公司 | Light path system for photoelectric tracking active chromatographic illumination |
| US11669002B2 (en) | 2021-06-16 | 2023-06-06 | Coretronic Corporation | Illumination system and projection device |
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Application publication date: 20121121 |